Slain al Qaeda chief Osama bin Laden. — Photo by AP

Here are some key facts about Osama bin Laden, who US officials said late on Sunday has been killed and his body recovered by US authorities.

* Bin Laden was born in Saudi Arabia in 1957, one of more than 50 children of millionaire construction magnate Mohamed bin Laden. His first marriage was to a Syrian cousin at the age of 17, and he is reported to have at least 23 children from at least five wives.

* Convinced that Muslims are victims of US-led terrorism, bin Laden is blamed for masterminding a series of attacks on US targets in Africa and the Middle East in the 1990s. His family, which became rich from the Saudi construction boom, disowned him, and he was stripped of his Saudi citizenship.

* He fought in the US-funded insurgency in the 1980s against Soviet troops in Afghanistan, where he founded al Qaeda. He returned to Afghanistan in the 1990s, training militants from across the world in camps allowed to function by the ruling Taliban.

* Tall, gaunt and bearded, bin Laden was unhurt by US missile strikes on his Afghan camps after the 1998 US embassy bombings in East Africa. According to some reports, he was nearly killed by a US bomb when militants were being hunted late in 2001 in the Tora Bora mountains in eastern Afghanistan.

* Bin Laden approved the September 11, 2001 attacks on the United States in which nearly 3,000 people died, saying later that the results had exceeded his expectations. With a $25 million US bounty on his head, he then evaded the world's biggest manhunt for a decade, with tens of thousands of US and Pakistani troops looking for him.

* Defence Secretary Robert Gates said in December 2009 that the United States does not know where bin Laden has been hiding and has not had any good intelligence on his whereabouts in years.

* More than 60 messages have been broadcast by bin Laden, al-Qaeda's number two Ayman al-Zawahri, and their allies since the September 11 attacks in 2001.

* In a September 2007 video marking the sixth anniversary of the September 11 attacks bin Laden said the United States was vulnerable despite its economic and military power, but he made no specific threats.